Ruler.



L. FOX.

RULEB.

ArPLIonIoN FILED FEB;29,1908

910,523. Patented Jan. 26, 1909.

1n: rwnms PETERS co., wnsnmarou. D. c.

LEO FOX, OF NEW YORK, N. Y.

BULER.

Application filed February 29, 1908.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Serial No. 418,539.

To all whom it may concern:

Be it known that I, LEO FOX, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented new and useful Improve- .The invention is especially adapted for use as a section-liner to be used in connection with a triangle, and its construction is such that it may also be attached to aT-square.

In order to enable others to understand, make and use my said invention I will proceed to describe the same in detail, reference being had to the accompanying drawing, and mu then set forth what I claim to be new.

Figure 1, is a perspective view of a combined ruler and section-liner made in accordance with the invention. Fig. 2, is a top plan view showing the device in use. Fig. 3, is a similar view showing the device attached to a T-square. Fig. 4 is a sectional view illustrating the operative relation between the detent and the grooved collar.

The device consists ofa straight edge or ruler 1, having a cut-away portion 2, at one end and an upstanding lug or ear 8, adjacent said cut-away portion. Through a screw threaded opening in said lug or car passes a step-by-step adjustable screw-threaded rod or screw 4, having a disk or stop 5, at one end constituting a stop or abutment for a triangle 6, and at its opposite end said threaded rod is provided with a milled head 7, having a collar 8, provided on its periphery with a series of equidistant transversely arranged grooves 9. Cooperatively associated with the grooves 9, in the collar 8, is a yielding spring detent 10, that is secured to the ruler 1, as shown. The yielding spring is arranged to successively enter the grooves 9 in the collar as the latter is turned by the milled head 10, and thus acts as a temporary resistance against further turning movement of the head and its rod 4, until the resistance of the spring is overcome.

The face of the ruler adjacent the cut-away portion 2, is provided with regularly spaced line graduations 13, the distance between any two of which is preferably equal to the feed movement of the threaded rod 4, and its disk 5, when said rod is rotated one complete revolution. These line-graduations 13, indicate the divisions between the section lines to be drawn, and it will be obvious that the disk may be adjusted with accuracy to cause the section lines to be regularly spaced equal to the space between any two or more of the line divisions, and when so adjusted it will be held in its adjusted position by means of the spring 10.

In order to enable the ruler or straightedge to be employed as a section-liner to be used with triangles of different size it is necessary to have an abutment opposite and in line with the disk 5, and to provide for the same I form in the front edge of the ruler 1 opposite the disk 5, a plurality of equi-distant threaded openings or sockets 14, into any one of which may be fitted a stud 15. By this construction if a small triangle is being used the stud 15, will be inserted in one of the openings 14, nearest the disk 5, while with a larger triangle the stud will be secured in one of the other openings farther removed from the disk.

I prefer to provide the upper face of the ruler 1, with an upwardly projecting knob or button 16, to be grasped by the fingers to facilitate movement of the device over the drawing when in use.

In some instances it is desirable to attach the section-liner directly to a T-square and to provide for such attachment I form openings .17, at opposite ends of the ruler 1, through which thumb tacks 18, or other fastening devices may be passed, all as more clearly shown in Fig. 3.

In using the device as a section liner, the stud 15, is first inserted in the pro er aperture 14, depending upon the length 0 the edge 19, of the triangle that faces the front edge of the ruler 1, as shown in Fig. 2. The point or angle 20, of the triangle is then brought to bear against the stud and the face of the disk 5, adjusted toward or from the angle 21, of the triangle, as the case may be, until the space between these two points, namely,

disk 5, andangle 21, equals the desired space between the section lines to be drawn. The first section line is now drawn after which the triangle is first moved parallel with the straight edge until angle 21 abuts the disk 5, then the straight edge is moved in the same direction until the abutment or stud 15, abuts the oint or angle 20, of the triangle, when it wil be found that the triangle is in, the proper position for the next section line to be drawn. The, tWQ parts are'each thus successively moved after every section line is drawn, and the result is that the-lines must be regularly and equally spaced. To change or vary the distance between the sectionv lines it isonly necessary to rotate the threaded rod or screw 4,, which willshiftt-he position of the disk 5, toward or fromv the angle 21, of the triangle 6, and the space between these two points will determine the distance between the section-lines to be drawn.

What I claim is v 1. An implement of the character described, comprising a straight-edge having an independent and' adjustably mounted abutment at one edge, a recess Within said edge an adjusting screw, a disk on one end of the screw fitting within said recess and a head and collar at the opposite end, said collar be ing provided with peripheral notches, and

a detent cooperating with said, collar and notches to resist free turning movement of the screw.

2., An: implement of the character described, com rising a straight-edge provided with a plura ity of a ertures in one edge, an independent stud a a ted to be removably inserted inany of sai apertures, andan adjusting screw at one end of the straight-edge.

3. An implement of the character described, comprising a ruler having a portion of its edge cut away at one end, an adjustable stop movable back and forth inv said cut-away portion, andan abutment at tee opposite end of the ruler.

4. A41 implement of the character, described, comprising a ruler having a. cutaway. portion at one end, an; adjusting screw carrying a. stop-disk movable inv said, cut,- away portion, a'. yielding detent for. resisting free turning movement ofsaid screw, and an abutment at the opposite endv of the ruler.

In testimony whereofl, have hereunto set my hand in presence of tworsubscr-ibing wit.- nesses.v

LEO FQX.

Witnesses DANIEL DIR Nzo, WILLIAM BARBIERI. 

